Armistice

"A military agreement suspending active hostilities between the belligerents. An armistice can be local (i.e., suspend operations in just one area) or general (i.e., suspend all operations). If the duration of the armistice is not defined, the belligerent Parties may resume operations at any time, subject to previous warning in accordance with the terms of the armistice. An armistice does not put an end to the state of war, which subsists with all its legal consequences.

In case of a serious violation of the armistice by one belligerent Party, an opposing Party may denounce it and, in cases of urgency, restart hostilities immediately.

Only a government may take the initiative in proposing an armistice. Besides making provision for the general armistice just mentioned, international law provides for local armistices for the collection, exchange and transfer of wounded."

Source: https://casebook.icrc.org/a_to_z/glossary/armistice